<style type="text/css">
    .demo{width: 100px;
        height: 100px;
        border: 1px solid red}
</style>
<body>
    <div class="demo"></div>
    <button>sss</button>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
<script type="text/javascript">
    $("button").click(function(){
        $(".demo").animate({
            aa:"200" //目的就是取一个属性值360
        },{
            step:function(now,fx){
                console.log(now);
                $(".demo").css({"transform":"rotate("+now+"deg)"})
            },
            duration:1000
        });
    })
</script>